YouTube A/B Title & Thumbnail Test
Let Claude score your title/thumbnail combinations before uploading. Compare against 10M+ view viral patterns and pick the winner with the highest CTR index.
Variant A
Variant B
How to use
- Enter the topic and 2–5 title variants.
- Optionally add a thumbnail URL for each.
- Click "Score CTR" to see 5-axis scores and the winner.
Scoring axes
Curiosity Gap
How much it piques curiosity to click
Specificity
Numbers, named entities, concrete details
Emotional Strength
Surprise, shock, empathy, outrage
SEO Match
Search-friendly keywords and trending terms
Thumbnail Coherence
Alignment with the title (if provided)
Picked the winner?
Generate the description and tags next, then upload.
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